We have created a few templates for BRDs/MRDs, communication templates and creative briefs. Are you using Agile development or more traditional waterfall? A great resource for communication and planning documents, that I've used a lot, is Project Connections http://projectconnections.com/. They have a paid membership, but many templates are also free.
What issue are you most struggling with? Buy in to the vision? status updates? understanding the features?
I'd be happy to provide some templates and work flow if you let me know what areas you're wanting to fine tune.